| .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
| .. c:namespace:: DTV.dmx |
| |
| .. _DMX_SET_BUFFER_SIZE: |
| |
| =================== |
| DMX_SET_BUFFER_SIZE |
| =================== |
| |
| Name |
| ---- |
| |
| DMX_SET_BUFFER_SIZE |
| |
| Synopsis |
| -------- |
| |
| .. c:macro:: DMX_SET_BUFFER_SIZE |
| |
| ``int ioctl(int fd, DMX_SET_BUFFER_SIZE, unsigned long size)`` |
| |
| Arguments |
| --------- |
| |
| ``fd`` |
| File descriptor returned by :c:func:`open()`. |
| |
| ``size`` |
| Unsigned long size |
| |
| Description |
| ----------- |
| |
| This ioctl call is used to set the size of the circular buffer used for |
| filtered data. The default size is two maximum sized sections, i.e. if |
| this function is not called a buffer size of ``2 * 4096`` bytes will be |
| used. |
| |
| Return Value |
| ------------ |
| |
| On success 0 is returned. |
| |
| On error -1 is returned, and the ``errno`` variable is set |
| appropriately. |
| |
| The generic error codes are described at the |
| :ref:`Generic Error Codes <gen-errors>` chapter. |
